JPS6211126B2 - - Google Patents
Info
- Publication number
- JPS6211126B2 JPS6211126B2 JP16125880A JP16125880A JPS6211126B2 JP S6211126 B2 JPS6211126 B2 JP S6211126B2 JP 16125880 A JP16125880 A JP 16125880A JP 16125880 A JP16125880 A JP 16125880A JP S6211126 B2 JPS6211126 B2 JP S6211126B2
- Authority
- JP
- Japan
- Prior art keywords
- pile
- tip
- pile body
- fitting
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 101100008046 Caenorhabditis elegans cut-2 gene Proteins 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は建築、土木等で用いる杭固定工法に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pile fixing method used in architecture, civil engineering, etc.
（従来の技術）
従来から、本体の径が小さく、地中の先端だけ
大きい杭が引抜け難く支持力の大きいことは知ら
れている。この先端が大きい杭のことをペデスタ
ル杭と呼んでいる。このペデスタル杭のつくり方
はすでに各企業、研究機関で様々な方法が開発さ
れ、施工されている。代表的なつくり方は第１図
Ａ〜Ｄに示す場所打ちコンクリート杭と呼ばれる
ものである。(Prior Art) It has been known that a pile with a small body diameter and a large underground tip is difficult to pull out and has a large supporting capacity. A pile with a large tip is called a pedestal pile. Various companies and research institutes have already developed and implemented various methods for making pedestal piles. A typical construction method is what is called a cast-in-place concrete pile, as shown in Figures 1A to D.
図中の符号６は削孔、７は再削孔、８はコンク
リート、９は鉄筋である。 In the figure, reference numeral 6 indicates drilling, 7 indicates re-drilling, 8 indicates concrete, and 9 indicates reinforcing steel.
（発明が解決しようとする問題点および目的）
しかしながら、上記の方法では次の問題点があ
る。(Problems and Objectives to be Solved by the Invention) However, the above method has the following problems.
(1) 土中の深部でその途中の孔径より大きい削孔
としなくてはならないので、途中の削孔のとき
使用した機械と異なるものを用意しなくてはな
らない。(1) Since the hole must be drilled deep underground and has a diameter larger than the hole in the middle, a machine different from the one used to drill the hole in the middle must be prepared.
(2) 再削孔した土の処理に工夫を要する。つま
り、削孔した土をほぼ完全に上部へ除去しなけ
ればならないからである。(2) Efforts are required to treat the soil after re-drilling. In other words, the excavated soil must be removed almost completely to the top.
(3) これらの点からでき上がつた杭が高価なもの
となる。(3) These points make the resulting pile expensive.
(4) 先端部の拡大が杭芯に対して偏心したりして
想定通りに施工できない。(4) The expansion of the tip is eccentric to the pile core, making it impossible to carry out construction as expected.
このように従来工法のペデスタル杭は種々の欠
点があつたが、本発明は、地中での支持力が大と
なるように先端部を拡大したいわゆるペデスタル
杭を安価、容易且つ設計通りにつくることのでき
る杭固定工法を提供することを目的としている。 As described above, conventionally constructed pedestal piles have various drawbacks, but the present invention enables the production of so-called pedestal piles with enlarged tips to increase the underground bearing capacity at low cost, easily, and according to the design. The purpose of this project is to provide a pile fixing method that can be used to secure piles.
（問題点を解決するための手段）
本発明の杭固定工法は、先端周部に複数個のス
リツトを形成してなる中空状杭本体と、この杭本
体の先端開口部を閉塞する杭先金具とからなり、
杭本体の先端開口部に杭先金具を嵌めて該先端開
口部を閉塞する一方、地面に所定の深さの孔を設
け、この孔内に前記杭本体を、杭先金具の方から
埋設した後、杭本体内に膨脹剤を注入し、時間の
経過によつて杭先に形成した前記スリツト部分を
拡大することを特徴とするものである。(Means for Solving the Problems) The pile fixing method of the present invention includes a hollow pile body having a plurality of slits formed around the tip, and a pile tip metal fitting that closes the opening at the tip of the pile body. It consists of
A pile tip fitting was fitted into the tip opening of the pile body to close the tip opening, while a hole of a predetermined depth was made in the ground, and the pile body was buried in this hole from the pile tip fitting side. After that, an expansion agent is injected into the pile body, and the slit portion formed at the tip of the pile is expanded over time.
（実施例）
以下、本発明の一実施例を図面を参照して説明
する。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
第２図乃至第５図において、符号１は金属ある
いは樹脂材等からなる中空状の杭本体で、この杭
本体１の先端部１ａ（土中に埋設される先端）に
は複数のスリツト２…を形成しておく。スリツト
２は２本以上形成しておくのが望ましい。３は杭
先金具で、杭本体１の先端開口部に嵌める。杭先
金具３は杭本体１の底蓋となるキヤツプ金具であ
る。 In FIGS. 2 to 5, reference numeral 1 denotes a hollow pile body made of metal, resin, etc., and a plurality of slits 2... Form it. It is desirable to form two or more slits 2. 3 is a pile tip metal fitting, which is fitted into the tip opening of the pile body 1. The pile tip metal fitting 3 is a cap metal fitting that serves as a bottom cover of the pile body 1.
このように杭本体１及び杭先金具３を形成し、
杭本体１の先端開口部に杭先金具３を嵌めた後、
第３図に示すように、杭本体１を土中に埋設す
る。掘削機等にてあらかじめ所定の深さに設けた
削孔５に杭本体１を埋設するのである。 In this way, the pile body 1 and the pile tip fitting 3 are formed,
After fitting the pile tip fitting 3 into the tip opening of the pile body 1,
As shown in FIG. 3, the pile body 1 is buried in the soil. The pile body 1 is buried in a hole 5 that is previously drilled at a predetermined depth using an excavator or the like.
杭本体１を目的の深さまで埋設した後、杭内部
に膨脹剤４を注入する。膨脹剤４は杭内部におい
て、第４図に示すように、切目２のやや上部まで
充填することが望ましい。膨脹剤４とは、水で練
りまぜて目的の孔や筒内に充填して放置しておけ
ば、硬化、膨脹して計画的に目的物に亀裂膨脹を
生じさせるもので、例えば小野田セメント株式会
社の商品名ブライスター等である。尚、膨脹剤は
ビニール等の袋に入れて杭本体内部に入れてもよ
い。 After the pile body 1 is buried to a desired depth, an expansion agent 4 is injected into the inside of the pile. It is desirable that the swelling agent 4 be filled inside the pile up to slightly above the cut 2, as shown in FIG. Expanding agent 4 is an agent that, when mixed with water and filled into a target hole or cylinder and left to stand, hardens and expands to cause planned cracking and expansion in the target object.For example, Onoda Cement Co., Ltd. The company's product name is Blystar, etc. Incidentally, the expansion agent may be placed in a bag made of vinyl or the like and placed inside the pile body.
このように杭内部に膨脹剤４を注入した後、約
15〜24時間経過すると、第５図に示すように、杭
本体１の先端部１ａに形成したスリツト２が膨脹
剤の硬化、膨脹によつて拡大されるものである。
杭先が拡大されるため、引抜き抵抗が大となると
ともに先端支持力も増大する。尚、杭本体１を削
孔５に埋設した後は、削孔５を埋め戻しておく。 After injecting the swelling agent 4 into the inside of the pile in this way, approximately
After 15 to 24 hours have elapsed, as shown in FIG. 5, the slit 2 formed at the tip 1a of the pile body 1 is enlarged by the hardening and expansion of the expanding agent.
Since the pile tip is enlarged, the pull-out resistance increases and the tip support capacity also increases. Incidentally, after the pile body 1 is buried in the drilled hole 5, the drilled hole 5 is backfilled.
本発明は、杭本体の先端部にスリツトを形成し
てこの先端開口部に杭先金具を嵌めて土中に埋設
後、膨脹剤を充填して時間の経過によつて杭先に
形成したスリツト部分を拡大して杭を固定する工
法であるから、次の各効果を上げることができ
る。 In the present invention, a slit is formed at the tip of the pile body, a pile tip metal fitting is fitted into the opening at the tip, and after the pile tip is buried in the soil, the slit is filled with an expanding agent and formed at the pile tip over time. Since this method involves enlarging the area and fixing the pile, the following effects can be achieved.
（発明の効果）
作業性が従来工法と比較して極めて優れてい
る。従来工法は、削孔〜再削孔〜土の除去〜配
筋〜コンクリート打ちであつたが、本発明工法
は、杭先加工〜削孔〜杭埋設〜膨脹剤注入でよ
く、工程が従来工法に比して半減できる。(Effects of the invention) Workability is extremely superior compared to conventional construction methods. The conventional construction method involved drilling, re-drilling, removing soil, placing reinforcement, and pouring concrete, but the method of the present invention only requires processing the pile tip, drilling, burying the pile, and injecting an expanding agent, and the steps are similar to the conventional construction method. can be halved compared to
従つて杭施工費が従来の約半分にダウンでき
る。 Therefore, the pile construction cost can be reduced to about half of the conventional cost.
設計通りに杭先の断面積を拡大できるため、
杭の支持力が大で安全性も増大した。 Since the cross-sectional area of the pile tip can be expanded as designed,
The bearing capacity of the piles is large and safety is also increased.
杭本体の先端開口部に杭先金具を嵌めると共
に、地面に所定の深さの孔を設け、この孔内に
杭本体を埋設するものであるから、埋設時に地
盤抵抗が小さく、杭本体や杭先金具が変形した
り壊れたりするおそれがない。しかも、埋設力
は小さくてよいので静かに作業できる。 The pile tip fitting is fitted into the opening at the end of the pile body, a hole is made in the ground at a predetermined depth, and the pile body is buried in this hole, so the ground resistance is low during burying, and the pile body and pile There is no risk of the tip fitting being deformed or broken. Moreover, since the burying force is small, the work can be done quietly.
このように、一般土木、建築の杭工事に利用す
ることができ、住宅土木等安全性の要求される現
場での杭工法に優れた効果を発揮する。 As described above, it can be used for general civil engineering and architectural piling work, and exhibits excellent effects in pile construction methods at sites where safety is required, such as residential civil engineering.
第１図Ａ，Ｂ，Ｃ，Ｄは従来工法の工程説明
図、第２図乃至第５図は本発明に係る杭固定工法
の一実施例を示し、第２図Ａは杭本体の中央部を
切欠いた正面図、同Ｂは底面図、同Ｃは杭先金具
の斜視図、第３図は杭本体を土中に埋設した図、
第４図は膨脹剤を杭本体内に注入した状態の拡大
図、第５図は膨脹剤によつて杭先が拡大した状態
の拡大図である。
１…杭本体、２…スリツト、３…杭先金具、４
…膨脹剤。
Figures 1A, B, C, and D are process explanatory diagrams of the conventional method, Figures 2 to 5 show an example of the pile fixing method according to the present invention, and Figure 2A is the central part of the pile body. Figure 3 is a cutaway front view, Figure B is a bottom view, Figure C is a perspective view of the pile end fitting, Figure 3 is a diagram of the pile body buried in the soil,
FIG. 4 is an enlarged view of the state in which the expansion agent is injected into the pile body, and FIG. 5 is an enlarged view of the state in which the tip of the pile is expanded by the expansion agent. 1...Pile body, 2...Slit, 3...Pile tip metal fitting, 4
...Bulking agent.
Claims (1)
中空状杭本体と、この杭本体の先端開口部を閉塞
する杭先金具とからなり、杭本体の先端開口部に
杭先金具を嵌めて該先端開口部を閉塞する一方、
地面に所定の深さの孔を設け、この孔内に前記杭
本体を、杭先金具の方から埋設した後、杭本体内
に膨脹剤を注入し、時間の経過によつて杭先に形
成した前記スリツト部分を拡大することを特徴と
する杭固定工法。1 Consists of a hollow pile body with a plurality of slits formed around the tip, and a pile tip fitting that closes the tip opening of the pile body, and the pile tip fitting is fitted into the tip opening of the pile body. while closing the tip opening;
A hole of a predetermined depth is made in the ground, and the pile body is buried in this hole from the pile tip metal fitting, and then an expansion agent is injected into the pile body, and as time passes, it forms at the pile tip. A pile fixing method characterized by enlarging the slit portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16125880A JPS5785421A (en) | 1980-11-14 | 1980-11-14 | Pile fixing work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16125880A JPS5785421A (en) | 1980-11-14 | 1980-11-14 | Pile fixing work |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5785421A JPS5785421A (en) | 1982-05-28 |
| JPS6211126B2 true JPS6211126B2 (en) | 1987-03-11 |
Family
ID=15731667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16125880A Granted JPS5785421A (en) | 1980-11-14 | 1980-11-14 | Pile fixing work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5785421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01136130U (en) * | 1987-11-12 | 1989-09-18 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685834A (en) * | 1986-07-02 | 1987-08-11 | Sunohio Company | Splay bottom fluted metal piles |
-
1980
- 1980-11-14 JP JP16125880A patent/JPS5785421A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01136130U (en) * | 1987-11-12 | 1989-09-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5785421A (en) | 1982-05-28 |
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